Author/Authors :
Raji، Seyed Hamid نويسنده Torabinejad Research Center and Department of Orthodontics, School of Dentistry , , Shojaei، Hasan نويسنده Department of Microbiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, , , Saeidi Ghorani، Parinaz نويسنده 3Department of Orthodontics, School of Dentistry, Ahvaz Jundishapour University of Medical Sciences, Ahvaz, , , Rafiei، Elahe نويسنده Dental Students Research Center, School of Dentistry, ,
Abstract :
Background: The advantages of coated orthodontic wires such as esthetic and their effects
on reduced friction, corrosion and allergic reaction and the signifi cant consequences of plaque
accumulation on oral health encouraged us to assess bacterial colonization on these wires.
Materials and Methods: A total of 18 (9 upper and 9 lower) epoxy resin coated 16 × 22 nickeltitanium
wires (Spectra, GAC, USA) and 18 (9 upper and 9 lower) non-coated 16 × 22 nickel-titanium
wires (Sentalloy, GAC, USA) with isolated packages were selected and sterilized before application.
The samples were divided randomly between upper and lower arches in 18 patients and hence
that every patient received one coated and one uncoated wire at the same time. Samples were
removed and cut in equal lengths after 3 weeks and placed in phosphate buffered saline buffer. After
separation of bacteria in trypsin and ethylenediaminetetraacetic acid solution, the diluted solution
was cultured in blood agar and bacterial colony forming units were counted. Finally, the data was
analyzed using the paired t-test and the signifi cance was set at 0.05.
Results: Mean of bacterial colonization on uncoated wires was more than that of coated wires (P < 0.001).
Conclusion: Bacterial plaque accumulation on epoxy resin coated nickel-titanium orthodontic
wires is signifi cantly lower than uncoated nickel-titanium wires.
